Apparatus for the manufacture of molded hollow glass articles.



No. 704,488.. Patented July 8, I902.

P. T. SIEVERT.

APPARATUS FOR THE MANUFACTURE OF MOLDED HOLLOW GLASS ARTICLES.

(Application filed. Jan. 28, 1902.) (No Model.)

Winewmeax- ,fizvew 0M. Mfiw UNiTnn STATES PATENT OFFICE.

PAUL TI-IEODOR SIEVERT, OF DRESDEN, GERMANY.

APPARATUS FOR THE MANUFACTURE OF MOLDED HOLLOW GLASS ARTICLES.

SPECIFICATION forming part of Letters Patent No. 704,488, dated July8,1902. Application filed January 28,1902. $erial No. 91,544. (Nomodel.)

To all whom it may concern: 7

Be it known that 1, PAUL THEODOR SIE- VERT, a subject of the King ofSaxony, and a resident of Dresden, in the Kingdom of Sanony, GermanEmpire, have invented a new and useful Improvementin Apparatus for theManufacture of Molded Hollow Glass Articles, of which the following is aspecification.

This invention relates to apparatus for the manufacture of molded hollowglass articles by the process which forms part of the subjectmatter ofmy application, Serial No. 63,713, filed June 8, 1901, for United StatesPatent. According to that process liquid glass is first spread out in asheet-like layer, which, while remaining plastic by the retention of aportion of the heat of fusion, is held to the margin of an open mold andallowed to mold itself therein by its own weight.

I will first fully describe the said apparatus with reference to theaccompanying drawings, and afterward point out its novelty in claims.

Figures 1, 2, 2, 3, 3, and d are vertical sectional views of the severalparts of the apparatus; illustrating their use in different stages ofthe process to be performed.

The essential parts of the apparatus consist of a slab a, in which themolten glass is first spread in a sheet-like layer, a simple undividedring or frame 0, onto which the said layer is taken from said slab, andan open mold f, into which the portion of said layer included withinsaid frame or ring 0 is allowed to mold itself by its own weight. Thismold has its interior of a form the counterpart of the exterior of thehollow article to be produced. The slab a is represented as providedwith a handle 8, and the ring or frame is represented as provided withtwo opposite handles 9. In Figs. 2 and 3 the ring or frame 0 isrepresented as having a sharp edge.

The operation of this apparatus is as follows: A mass of liquid glass 1)having been deposited, as shown in Fig. 1, upon the slab a and havingbeen spread out thereon in a sheet-like layer, as shown in Fig. 2, theframe or ring a is placed with its sharp edge downward upon the saidlayer and the said edge is pressed into the glass. The slab,the frame orring,and the layer of glass are then inverted together, and the handles9 of the frame are placed on any suitable supports 6 e, as shown in Fig.3, wherein it is shown that the glass,

which is in a plastic condition, begins to sag within the frame or ring0. The frame or ring is then placed upon the margin of the open moldf,as shown in Fig. 4, and has the slab removed from it. The glassremaining plastic by the retention of a portion of the heat of fusiongoes on sagging or sinks by its own weight through the frame and withinthe mold until by coming to rest against the interior of the latter itreceives the desired shape.

.Figs. 2" and 3 illustrate a modification of the frame 0, which is madewith an internal groove 0 running all around it for the purpose ofholding the edges of the spread layer 5 of glass. For the use of thisholding-frame c the plate a is made without the surroundingupwardly-projecting rim shown upon it in Figsl, 2, and 3, and in suchuse the said frame is placed upon the plate a before the pouring of themolten glass upon the latter, and then the molten glass is poured withinthe said frame.

What I claim as my invention is 1. In an apparatus for the manufactureof molded hollow glass articles, the combination of an open mold and anundivided frame for holding a layer of plastic glass independently ofthe mold itself and supporting the so-held layer on the margin of themold while a portion of saidlayer within said frame sinks through saidframe into the mold and molds itself therein by its ownweight,substantially as herein described.

2. In an apparatus for the manufacture of molded hollow glass articles,the combination with an open mold, of an undivided and invertible framefor receiving and turning over a layer of plastic glass and supportingthe so received and turned-over layer on a margin of the mold While aportion of said layer within said frame sinks through said frame intothe mold and molds itself therein by its own weight,substantially asherein described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 10th day of January, 1902.

PAUL THEODOR SIEVERT.

Witnesses;

HERNANDO DE Soro, EMIL Wonnn.

